EP 0774705 B1 20030723 - Comparator with hysteresis for use in a voltage regulating circuit
Title (en)
Comparator with hysteresis for use in a voltage regulating circuit
Title (de)
Hysteresebehaftete Komparatorschaltung zur Verwendung bei einer Spannungsregelungsschaltung
Title (fr)
Comparateur à hystérésis pour utilisation dans un circuit régulateur de tension
Publication
Application
Priority
DE 19542823 A 19951116
Abstract (en)
[origin: EP0774705A2] The comparator circuit has a differential stage (D) forming a component of a cascade circuit (L,D,S,G) which has on one side of the differential stage a load stage (L) with load transistors (MN1,MP2) and on the other side a negative feed back stage (G). A reference voltage is applied both to the control electrode of a first load transistor (MN1), which has a high impedance input and supplies the voltage to be compared, and to the control electrode of a second load transistor (MP2). The first transistor represents a constant load impedance and a third load transistor (MP2) is connected in parallel with the second transistor which is switched on or off depending on signals from the comparator circuit. The result is that a further load impedance is either connected or not connected in parallel with the second transistor.
IPC 1-7
IPC 8 full level
G05F 3/26 (2006.01)
CPC (source: EP US)
G05F 3/267 (2013.01 - EP US)
Citation (examination)
- US 3938055 A 19760210 - BUHLER FREDERICK T
- PATENT ABSTRACTS OF JAPAN vol. 008, no. 049 (E - 230) 6 March 1984 (1984-03-06)
Designated contracting state (EPC)
FR GB IT
DOCDB simple family (publication)
EP 0774705 A2 19970521; EP 0774705 A3 19980128; EP 0774705 B1 20030723; DE 19542823 A1 19970522; DE 19542823 C2 19970904; US 5739705 A 19980414
DOCDB simple family (application)
EP 96118126 A 19961112; DE 19542823 A 19951116; US 74676896 A 19961115